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WHAT IS THE AURORA BOREALIS?

The Aurora is an incredible light show caused by collisions between electrically charged particles released from the sun that enter the earth’s atmosphere and collide with gases such as oxygen and nitrogen. The lights are seen around the magnetic poles of the northern and southern hemispheres.

Auroras that occur in the northern hemisphere are called ‘Aurora Borealis’ or ‘northern lights’ and auroras that occur in the southern hempishere are called ‘Aurora Australis’ or ‘southern lights’.

Both Aurora’s can be seen in the northern or southern hemisphere, in an irregularly shaped oval centred over each magnetic pole. Scientists have learned that in most instances northern and southern auroras are mirror-like images that occur at the same time, with similar shapes and colours. Auroral displays can appear in many vivid colours, although green is the most common. Colours such as red, yellow, green, blue and violet are also seen occasionally. The auroras can appear in many forms, from small patches of light that appear out of nowhere to streamers, arcs, rippling curtains or shooting rays that light up the sky with an incredible glow.

Auroras are the result of collisions between gaseous particles (in the Earth’s atmosphere) with charged particles (released from the sun’s atmosphere). Variations in colour are due to the type of gas particles that are colliding. The most common aurora colour which is green, is produced by oxygen molecules located about 60 miles above the earth. The rarer red auroras are produced by high-altitude oxygen, at heights of up to 200 miles. Nitrogen produces blue or purple aurora.

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Soal ini adalah soal tentang Report text (jenis teks laporan yang bertujuan untuk menyampaikan informasil kepada pembaca mengenai hasil penelitian sesuatu). Dalam soal ini, kita diperintahkan untuk menjawab pertanyaan berdasarkan teks. Arti dari soal ini adalah "Teks tersebut mungkin berguna untuk ...." Berdasarkan teks, dapat disimpulkan bahwa teks ini akan berguna untuk "Students who are interested in science" (Siswa yang tertarik dengan sains). Jadi, jawaban yang tepatadalah B.

Soal ini adalah soal tentang Report text (jenis teks laporan yang bertujuan untuk menyampaikan informasil kepada pembaca mengenai hasil penelitian sesuatu). Dalam soal ini, kita diperintahkan untuk menjawab pertanyaan berdasarkan teks.

Arti dari soal ini adalah "Teks tersebut mungkin berguna untuk ...."

Berdasarkan teks, dapat disimpulkan bahwa teks ini akan berguna untuk "Students who are interested in science" (Siswa yang tertarik dengan sains). 

Jadi, jawaban yang tepat adalah B.

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